1538428222 has 4 divisors (see below), whose sum is σ = 2307642336. Its totient is φ = 769214110.

The previous prime is 1538428193. The next prime is 1538428249. The reversal of 1538428222 is 2228248351.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1538428222² = 4733522788492162568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384607054 + ... + 384607057.

It is an arithmetic number, because the mean of its divisors is an integer number (576910584).

Almost surely, 2^1538428222 is an apocalyptic number.

1538428222 is a deficient number, since it is larger than the sum of its proper divisors (769214114).

1538428222 is an equidigital number, since it uses as much as digits as its factorization.

1538428222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769214113.

The product of its digits is 61440, while the sum is 37.

The square root of 1538428222 is about 39222.8023221187. The cubic root of 1538428222 is about 1154.4073399777.

The spelling of 1538428222 in words is "one billion, five hundred thirty-eight million, four hundred twenty-eight thousand, two hundred twenty-two".